Hi

I just have migrated my DB from 7.15.7 to 8.2.1. Everithing looks good except content. Content tab is empty. Only "Recycle Bin" is visible.

When Backoffice Content tab is load the following log is:

{"@t":"2022-01-20T09:29:30.9650108Z","@mt":"Failed.","@l":"Error","@x":"System.NullReferenceException: Object reference not set to an instance of an object.\r\n   at Umbraco.Core.Services.PropertyValidationService.IsPropertyValueValid(PropertyType propertyType, Object value) in D:\\a\\1\\s\\src\\Umbraco.Core\\Services\\PropertyValidationService.cs:line 133\r\n   at Umbraco.Core.Services.PropertyValidationService.IsPropertyValid(Property property, String culture, String segment) in D:\\a\\1\\s\\src\\Umbraco.Core\\Services\\PropertyValidationService.cs:line 85\r\n   at Umbraco.Core.Services.PropertyValidationService.<>c__DisplayClass4_0.<IsPropertyDataValid>b__0(Property x) in D:\\a\\1\\s\\src\\Umbraco.Core\\Services\\PropertyValidationService.cs:line 43\r\n   at System.Linq.Enumerable.WhereEnumerableIterator`1.MoveNext()\r\n   at System.Linq.Buffer`1..ctor(IEnumerable`1 source)\r\n   at System.Linq.Enumerable.ToArray[TSource](IEnumerable`1 source)\r\n   at Umbraco.Core.Services.PropertyValidationService.IsPropertyDataValid(IContent content, Property[]& invalidProperties... 

I checked umbracoNode and umbracoDocument tables. Content records are present.

the other tabs are ok

Thanks in advance